Valve-control device



0a. 1 1927 M. von DER HEIDE VALVE GONTBOL DEVISE Filad April. 6. 1925 2 Sheats-Sheot 2 J/2 van/an Patented (kt. 11, 1927 ST'EES MAX VON DER HEIDE, OF KIEL, GERMANY.

VALVECQNTROL DEVISE.

Application fi1ed April 6, 1925, Seri'al N0, 21,092; a11d in Germany April 14, 1924.

breaching in breathing apparatus.

A known arrangement in breathing apparaius f01 regulating the suppiy of breathing gas requimd 3?01 be lnngs of the usw; offhe apparatus c0mprises tw0 levers 1noved in 0m303ie directions f0r the purpose 0f contfliing ehe adrnission 0f as at a high nressure, whica levers are piaced in t-he reathing ba g 01 in sonne ocher bag affected by che nioions due 0 suction 013 inha'lation- In this known arrangement the fulcrums of the two ievars are arrangzed above and belm the va]ve ciosingr boy in the valve casing. Adisadvantage of chis arrang'ernent is that the posiion' 0f the fu1c1un1s of the iQVI'S re1aiiveiy to the axis 01 the valve closing n1ember cannot be ohosen at will so "that certain limiiatlons are imposed which prevent the n1ost favorable ratio being 0biained besween the power and load arms 01 the 1evers for ihe greatestsensitiveness 0'f che valve.

This invention nonstitutes a more favorab]e solution of this problem. It consists in piotin the levers in the axis of the s1icL inq spz -actnated, valve-closing memben and in a space between the vaivecasing, 01 a wart fixed t0 the same, and the valve clos inkl 1nen1be1. and in providing can1 surfaces nea1 die fulcru1n 01 nivos 0f the levers by which the va1ve closin9; memben is shiff d a:ciall v ag'ainsb its spring when the levers are rotat-ecior rocked in opposite directions The sensitiveness 0f the nove1 valve sontroiling arranpgemen can beincreased by placing a rolling mernber such as a ball between die co-operatinq cam surfaces. The co-operating 01' juxta-positioned surfaces of the 'levers near their pivors may be provicled :E0 fliis purpose with recesses of gradually nreasinq depths which are so shaped and ocaced that the deepest parts ofthe two rece-sses 053 a coopelating pair 0f recesses register With each othe1 when the 1evers are rocked in a certain position. while the shal- 10W arts 0f the two recesses 0f a pai1 register with each other when said 1eve1s are turned into another position, and a ba1l is locaied in each pair 0f recesses for moving thee 1e\'ers apart in the direction 0i the axis of the valve closing men1ber and for thus forcing said slide member away fro1n t-he valve seat when the shallow parts of a pair 0f 1'CBSSQS are c-aused to register with each ocher.

T0 enabl e the valve closing member t0 be' easiiy itaken 0ut 0f ihe valve casing. the 1e- VGIS may be pivoted 0n a part which is sepamtefrom the said member and does riot interfere with its removal. T0 this end a slee-ve that serves a a bearing 01 pivot f0r said 1evers 1nay be screwed into the valVe casing, an the ValVe closing member may. be arranged t0 slide in a bore of the said sleeve. An alternative arrangement C011- sis:ts in forminq the fiuid conductor 0r vaflve seat as a pivot for the valve levers and in arranging the va1ve closing member so that i.t slides in a slide-way in the valve casing independent-ly 0f the part 0f the valve seat 021 Which the levers are pivoted.

T0 reduce the resistance to be overconhe in movinp; the levers, balls niay 'be proVided mit only between rhe juxtapositioned co-oper ate surfaces but also between the externa'l s'urfaces of the 1evers and the surfaces in the valve casing'abutillg 011 said external surfaces.

The invention is illustrated in t he drawing in Whi0b Figs. 1 and 2 show a vertical anal hnrizontal section respectively throgh vah e whose controlling levers are provided with cooperating gliding cam surfaces.

Figs. 3 and 4 represent respectively a Vertical and a horizontal section through a valve in Which the co-operating surfaces 0f ehe va1ve controlling levers roll upon each other.

Figs. 5 und 6 are vertical sections through two further modifications in Which the rotary movements of th va]ve controlling ievers a1e transiated into an axia1 or. lateral shifting; movement of the valve controlling membe-r by means of co-operating pairs of recesses in the adjacently-positioned surfaces of the levers.

Figs. 7 and 8 a17e side and sectional views respectiveiy which show the f01m of said recesse-s.

As \Vi1i be seen from Figs. 1 and 2 an axially 01 longitudinally displaceable valve closing men1ber 2 is provided in the valve casing 1 and pressed by a spring 3 against izhe n1outh 0f fl1 gas outlet or nozz1e 4. T1e valve cont'rolling levers 5 a-nd 6, WhiCh project into a collapsibfle bag (not shown) in a Weil known manner, have ends that are pivoted 011 the valve closing member 2 so 1311211; they mayrotate around t110 Same (in Fig. 1 t11e levers 5, 6 m0ve towards und,

hub7 that extends tow-ards t11e left for1ns 21 journal for t11e ring 01 hub 10 01 the other 1ever 6. '1he 111110 7 carries between the ring 10 21nd its shou1der 21 ring 11 fixed by means of a s'et sc1'ew 12. The valve c1osing spring 3 tendsto press all 01' the sa1d parts t0 gebher 11V means 01 21 shoulder 011 the va1ve closing meniber abutting upon the1efc'thand end 01 .sz1id ring. T110 spring 3 also tends t0 press. the right hand end 01? the hub 7 against the valve casing l. T110 adjacent surfaces 01 the'bearing 1ingl0 01' tl1e, levr 6 1nd 01 the rin'g 11 are provided with cam surfaces 13,141. When the levers 5 and 6 arein 21 certain position as shown, the 021111 surfaces 13, 14 110 side by side 212 shown in 2, but when th0 breathing bz1g, 017 levercontrolling bag, 110t shown in the drawing, collztpses -the 1@Vers 5 -2111 :1 6 211e rotaced in opposite direct-ions und the ca1ns 13 and 14 ride 01110 0ne another, and as 1110 1ight band 8I1C101' the hnb 7 abuts upon Ehe valve 0&8- ing 21t the right the va1ve closing men1ber 2 is displaced towards the left against the 21ction 01' the spring 3 so thatthe Va1ve nozzle 4: is opened.

In the modification shown in Figs. 3 and 4 the ends 01 the valv0 controlling levers 5 an d 6 a1e pivot ed on pins 16 and 17 1111211; extend transversely in a longitudinal s1ot 15 in th0va1ve closing msmber 2. T110 piv oted ends oft t11e levers1mve rolling sann surfaces Whi0h c'0-0perz1te with nach otherwhen the levers 211e rotated 111 opposite directions. The pin 16 is fixec1 in a S1eeve 18 which is screwed into an 0Xt01711211 s1eeve 20. T110 interna1 sle0ve 18 has pins 19 which prevent i t f10n1 turninp; in the valve casing l. T110 pin 16 passes t111011g1'11 longindinal slots 22 in the va1ve closing nmn1bcr 2. By rotating ehe external sleeve 20 aronnd t11e internal sleeve 18 by 1neans 01 notches 21 in the circumference 0f the sleeve 20 the positi0n of the fixed pin 16 C2111 b6 displaced to the rigl1c- 01 ]e1t anal the stroke .0f t11e valve closing n1ember 2. which is moved longitudinally by the 0sci11ation 01 the 211111S 5 and 6, can thns 100 adjnsted.

Toennble th slevers 5 and 6 170 100 easily mountedon'their pins 16 and 17, they are provided Wii h lateral slots 23 2111d24 res0ectively. The levers 11121y 100 secured 011 their pins 16 and 17 by means of screws 25 and 26'a1t11011g11 this is n0tabsolutely necessary, because the pressure of the valve 010sing spring 3 Will prevent the levers 5 and 6 from slipping 011 their pins 16 anc1 17 in any case.

1t is obvious that 113 is sufiicient to oscil- 1ate only 0110 0f 'the levers 5 0r 6 to cause a displacement 01 the valve closing 1nembel 2 f01 the Purpose 01 opening the valve. H0nce the laterally displaceable lever 6 c0u1d be replaced by 21 rollen 111 distinction I"10111 ths bearing arrange nentric t0 the cent-re- 0f the va1ve closing 11101111301, these recesses be1ng d1sp1aced W1th respect t0 each ot-her by 120 degrees. The dephs 01" 13110 recesses deorease in the direction 01 rotation oppositeto thatin which t11e levers are turned aro und the va1ve c1osing 1110111ber2 when the valve is to be opened. The thre e recesses in 'che twoadjacent sun faces 0f the 1evers 5 und 6 101'111 three pairs 01 recesses in euch 01" which there is a ba1l 32. When the levers are rotated so thz1t the deepest parts o'f a pair 01:. recesses register with each other the ball 32 sinks int-o the recesses unc1er t11e action 01: the valve 010sing spring, 2111c1 the v211ve is t-hen closed. VVhen the levers 5 and 6 are rotated in the opposite direction, the shallow parts 01 each pair 0f recesses register With each 0ther and the balls then hause the bearing ring- 27 10 be iaterzilly displaced so that the valve closing 11101111101 2is shifted against the action 01' the spring 3 becanse the bearing ring 28 in Figx 5 abnts npon a fixed shoulder 34 011 die sleeve 29 screwed into the casing 1, and

in Fig. 6 the bearing 1ing 28 abuts upon a washer secnred npon tl1e nozz1e 4. In Fig; 8 the cooperation 0f the ba1ls 32 and 01 the recesses 30 01 grudually increasing depths in the adjacent suifaces 0f 1110 bearing rings 27 .and 28 is illustrated. The 21110ws in this figure show the direction of roation 0f th0 bearing rings when ehe levers 5 and 6 211e r0tated 10 c].ose the valve. This movement of the levers takes place Wh0n the breathing bag is 'expanded by the adinission 01 oxygen f1'0111 the oxygen Container and the levers are released to a110w the spring 3 120 c1ose the valve.

l 111 01'001 10 further reduce the resistance offered by t11e levers and co-operating Parts ba11s 36 are provided in Fig. 5 between the bearing ring 28 and the 001121r 34 01 the sleeve 29 anc1 further bal1 s are placed between the bearing ring 27 and the abutting surface 35 of the Valve closing member 2. A sinn'lar anangement is provided in Fig. 6 except that the member 37 which corresponds to the pa1t 2 in Fig. 1 does not itself close the nozzle 4 but is provided with an axially movable stoppen 38 whose stroke can be adjusted by means o1 a threaded recessed ring 39, the valve closing spring 3 pressing against the botton1 of the recess.

I claim:

l. Valve control device 016 the kind described comprising a body with a valve closing member arranged to slide therein, a spring for pressing the valve-closing member into its valve-closing position, rocking levers having their pivotal axes arranged substantially in the central portion of said slide member, and co-operating surfaces on said 1evers for shifting said 1nember into its valve-opening position when the levers am rocked in opposite directions.

2. Valve control device 0f the kind described comprising a casing und a valve seat therein, a slide member slidingly disposed in said casing to co-operate with tne valve seat, a spring for forcing said slide member onto said valve seat, rocking levers having their pivotal 'axes arranged substantially in the central portion of said slide member, and cam surfaces 011 said levers f01 shifting said slide member away from said valve Seat when the levers are rocked in opposite directions.

3. Valve control device of the kind decribed comprising a valve casing with a valve seat therein, a sleeve fixed in said valve casing, a slide member in said sleeve, a spring for iorcing said member onto said valve seat, levers pivoted on said sleeve and having pairs 0f co-operating recesses of graduaily increasing depths near their pivots said recesses being of such shape and location that the deepest parts 0f two recesses of a pair register with each other when said levers are rotated to a certain position, While the shallow parts of two recesses of a pair register with each other when said levers a1e moved into another osition, and a ba11 located in each pair of recesses f01 moving the levers apart and forcing said ing in the axis of the bo1e 015 the fluid condnctor, a spring for forcmg the s11de member onto said valve seat, levers pivoted t0 rotate round said axis and having pairs of co-operating recesses 0'E gradually increasing depths near their pivots, said recesses being 0f such shape and location that the deepest parts oi two recesses of a pair register with each 0511er when said levers are rotated in a certain position, While the shallow parts 0:E two recesses of a pair regiscer Wiiih each other when saidlevers are moved into another position, and a ba1l locatecl in each pair of recesses for moving the levers apart and forcing said slide 1nember away from said valve seat when the shallow parts of a pai1 01" said recesses a1e caused 110 register with each other.

5. Valve control device '0'f the kind desc1ibed comprising a casing with a slide way and a va]ve seattherein a slide member a1- ranged in said slide way to oo-operace with th'e valve seat, a Spring for forcing saic1 sl1de member onto said va1ve seat, levers pivoted in the axis 0f said s1ide member and having external surfaces and adjacently-positioned interacting surfaces provided with pairs of recesses of gradually increasing depths and of such shape and location that the deepestarts of the two recesses of a cooperating pair 0f recesses register with each other when thesaid levers are rocked t0 a certain osition, while the shallow parts of two recesses 0f a pair register with each other when said 1evers are moved into another position, a ball located in each pair of recesses for moving the levers apart and forcing said slide Inember away from said va1ve seat when the shallow parts of a pair 0f said recesses are caused t0 register with each othe1, and ball s arranged between said external and abutting surfaces.

In testimony whereof I affix n1y signature.

MAX VON DER HEIDE. 

